Fan



FIG. 1 is a front plan view thereof;

FIG. 2 is a rear plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a rear perspective view thereof;

FIG. 5 is a front perspective view thereof;

FIG. 6 is a side perspective view thereof; and,

FIG. 7 is a right side elevation view thereof. 

CLAIM The ornamental design for a fan, as shown and described. 